It was a Thursday afternoon and I was up $4,200 on a position that had been running beautifully for two days. My system said hold. My rules said hold. My brain, however, had already started doing that thing — that quiet, insidious arithmetic where you convert unrealised gains into what you could buy with them. A new set of golf clubs. Maybe half a weekend away. And then I clicked out.

The position ran another $11,000 without me. I sat there watching it like a man who'd left a party at 9pm and found out it became legendary. That's loss aversion wearing a disguise — it doesn't always look like fear of losing. Sometimes it looks exactly like taking a profit.

CONCEPTCutting winners early feels like discipline — but it's usually fear in a respectable costume.
WARNINGA strategy with a great win rate still fails if average winners are smaller than average losers.
KEY IDEAMark Douglas called it: your beliefs about money sabotage your execution before the market gets a chance to.

Mark Douglas nails this in Trading in the Zone. He argues the problem isn't the market — it's the meaning we attach to money sitting in a trade. Every tick of open profit feels fragile, temporary, already half-gone in our minds. So we grab it. The psychological term is the disposition effect — the documented tendency to sell winners too soon and hold losers too long. It's embarrassingly universal.

Early Exit vs. Full Run — 10 Trades02R4R6REarly exitFull run

What actually fixed it — partially, anyway — was treating each trade as a probability event rather than a personal financial transaction. Douglas calls this thinking in probabilities, and it's genuinely hard to internalise. Logging every early exit alongside what the trade ultimately did was brutal but clarifying. Resources like risk-reward ratio analysis and broader reading on behavioural economics helped me understand the wiring — even if rewiring takes considerably longer.

You can have the best entry signals on earth and still blow up your expectancy one nervous click at a time. The market doesn't beat most traders — their own relationship with money does.

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